Decadent Banoffee Cake Recipe with Caramelized Bananas

This easy banoffee cake is soft, moist, and full of banana and caramel flavor. A simple one‑bowl banana cake is topped with stabilized whipped cream, a buttery toffee sauce, and caramelized banana slices for a stunning finish. If you prefer to save time, store‑bought caramel, dulce de leche, or toffee sauce work well in place of the homemade sauce.

Why you will LOVE this recipe:

• Easy: The banana cake comes together in one bowl and requires only a whisk — no electric mixer needed.
• Soft and moist: The combination of melted butter and sour cream yields a consistently tender, moist crumb.
• Luxurious toffee sauce: A silky, rich toffee fills the center and drips for dramatic presentation.
• Double banana: Bananas are folded into the cake and caramelized slices crown the top.
• Fluffy frosting: Stabilized whipped cream with cream cheese gives you a light but sturdy topping.

What makes the best banana cake

Use overripe bananas — the spotted or dark ones are the sweetest and give the best banana flavor. If you often end up with too‑ripe fruit, peel and freeze bananas to use later.

The cake batter uses melted butter and sour cream, which keeps the crumb tender and flavorful. For extra richness and moisture, you can brush the baked cake with a simple toffee syrup (toffee sauce whisked with a little milk). This is optional — skip it if you prefer an unsoaked cake.

Homemade toffee sauce

The toffee sauce that fills the center is intentionally thinned with extra cream so it pours out when you slice the cake. It’s made from plain sugar, butter, heavy cream, a pinch of salt, and vanilla — caramelized gently until golden, then finished with cream and flavoring. Once cooled it keeps in the fridge for several days, making it a great make‑ahead component.

Tips to prevent toffee sauce from crystallizing or splitting

• Cook on medium‑low heat and be patient — low and slow prevents separation and burning.
• Whisk at the start to combine butter and sugar, then stir gently and frequently with a spoon to keep the mixture smooth.
• If the sauce starts to crystallize or split, continue cooking until it turns a uniform golden color, then add the cream and simmer until the crystals dissolve. Cool in a heat‑proof jar.
• Make the sauce a few days ahead and refrigerate to save time on assembly day.

Alternatives to toffee sauce

If homemade toffee feels intimidating, these alternatives work beautifully:

• Dulce de leche: Thicker but intensely caramelized and complementary to banana — an excellent shortcut.
• Caramel sauce: Store‑bought or a simple homemade caramel will also pair well.
• Butterscotch sauce: Slightly different flavor, often made with brown sugar, and easier to prepare if that suits your taste.

Key ingredients

Read the full recipe card below for exact quantities. These notes will help ensure success:

• Heavy whipping cream: Use 35% milkfat or higher so the cream whips properly.
• Unsalted butter: Provides balanced flavor for both cake and sauce; avoid salted butter in the toffee to prevent oversalting.
• Sour cream: Full‑fat sour cream adds moisture and improves texture — avoid low‑fat swaps.
• Bananas: Spotty bananas are best for the batter; use slightly less ripe bananas for caramelizing so they hold their shape and don’t turn mushy.
• All‑purpose flour: For accuracy, weigh the flour or spoon and level when using measuring cups to avoid a dense cake.
• Cream cheese: Full‑fat brick‑style cream cheese blends smoothly into the frosting; mascarpone is a good substitute if preferred.

Step by step: Toffee sauce

1. Melt butter in a small heavy‑bottomed saucepan. Add granulated sugar and whisk to combine — it will thicken.
2. Cook over medium‑low heat, stirring gently and frequently, especially around the edges, to prevent burning or splitting.
3. When the mixture reaches a golden caramel color and smells of caramelized sugar, carefully pour in the cream while whisking. Stir in vanilla and salt.
4. Bring the sauce back to a simmer, then transfer to a heat‑proof jar to cool. If you need a thinner sauce later, whisk in extra cream one tablespoon at a time.

Step by step: Cake

1. Preheat oven to 355°F (180°C). Grease an 8″ or 9″ round pan and line the bottom with parchment.
2. In a large bowl, whisk together brown sugar, granulated sugar, and eggs until the mixture lightens and thickens (30–60 seconds).
3. Add salt and vanilla, then whisk in melted cooled butter and sour cream.
4. Mash bananas and measure 1¼ cups; fold them into the wet ingredients.
5. Sift flour, baking soda, and baking powder into the same bowl and fold until the batter is smooth and no dry streaks remain.
6. Pour the batter into the prepared pan, smooth the top, and bake 50–60 minutes or until a toothpick inserted in the center comes out clean.
7. Cool the cake 15 minutes in the pan, run a knife around the edge, invert onto a rack or plate, remove parchment, and cool completely.

Step by step: Caramelized bananas

1. Slice bananas on the diagonal into about 3/4″ thick pieces and roll each slice in brown sugar.
2. Heat a nonstick or cast‑iron pan over medium‑high heat and melt butter. Place banana slices cut‑side down in the pan.
3. Cook until each side is caramelized, flipping carefully and watching closely to avoid burning. Cool on a plate.

Step by step: Whipped cream frosting

1. Whisk softened cream cheese with powdered sugar and vanilla until smooth.
2. In a chilled bowl, whip heavy cream to medium‑stiff peaks (stand mixer or whisk by hand).
3. Fold the cream cheese mixture into the whipped cream and whisk to firm, then frost the cake immediately.

Step by step: Assembly

1. Optional: For an extra moist cake, poke holes halfway through the cooled cake with a skewer. Whisk 2 tablespoons of toffee sauce with 4 tablespoons milk (or water) and brush over the top. Let it soak for a few minutes.
2. Spread the whipped cream frosting over the top, creating a shallow well in the center with slightly raised edges.
3. Thin the toffee sauce with a little extra cream if needed, then fill the center well with the toffee. Arrange the cooled caramelized banana slices in a semicircle on top. Slice and serve with additional sauce.

FAQ

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📖 Recipe

Banoffee Cake

A soft, moist banana cake topped with stabilized whipped cream, a silky toffee sauce, and caramelized banana slices. Use premade dulce de leche or caramel if desired.

Prep Time: 30 mins

Cook Time: 50 mins

Total Time: 1 hr 20 mins

Serves: 8 people

Course: Baking, Dessert

Cuisine: American

Equipment

• 8″ round baking pan (a 9″ pan works too)

Ingredients

Toffee Sauce

• ½ cup unsalted butter
• ½ cup granulated sugar
• ½ cup heavy whipping cream
• ¼ cup heavy whipping cream (optional to thin sauce)
• 1 tsp pure vanilla extract
• ¼ tsp sea salt

Banana cake

• ¾ cup packed brown sugar
• ½ cup granulated sugar
• 3 large eggs, room temperature
• ¼ tsp sea salt
• 1 tbsp pure vanilla extract
• ⅔ cup unsalted butter, melted and cooled
• 1 cup sour cream
• 1¼ cup mashed bananas (about 3–4 medium)
• 2½ cups all‑purpose flour (300 g)
• ½ tsp baking soda
• 2 tsp baking powder

Caramelized Bananas

• 2 tbsp butter
• 2 bananas (not overly ripe)
• ¼ cup brown sugar

Whipped Cream Frosting

• 4 oz cream cheese, softened
• ½ cup powdered sugar
• ½ tsp pure vanilla extract
• 1 cup heavy whipping cream

Instructions

Toffee sauce

1. Melt butter in a small heavy‑bottomed saucepan. Add sugar and whisk until combined and thickened.
2. Heat over medium‑low, stirring gently and frequently to avoid burning or splitting.
3. When golden and fragrant, carefully whisk in the cream. Add vanilla and salt, then simmer briefly.
4. Cool in a heat‑proof jar. Thin with extra cream if needed before using.

Banana cake

1. Preheat oven to 355°F (180°C). Grease and line an 8″ or 9″ round pan.
2. Whisk brown sugar, granulated sugar, and eggs until lighter in color and slightly thickened (30–60 seconds).
3. Add salt and vanilla, then whisk in melted butter and sour cream.
4. Stir in mashed bananas (1¼ cup).
5. Sift flour, baking soda, and baking powder into the bowl and fold until just combined.
6. Pour into the pan and bake 50–60 minutes, until a toothpick comes out clean. Cool 15 minutes, then invert and cool completely.

Caramelized bananas

1. Slice bananas on the diagonal and roll in brown sugar.
2. Melt butter in a skillet over medium‑high heat and place banana slices cut‑side down.
3. Caramelize both sides, flipping carefully. Cool on a plate.

Whipped cream frosting

1. Beat cream cheese with powdered sugar and vanilla until smooth.
2. Whip heavy cream in a chilled bowl to medium‑stiff peaks.
3. Fold the cream cheese mixture into the whipped cream until stiff peaks form. Frost the cake immediately.

Assembly

1. Optional: poke holes in the cooled cake and brush with a mixture of 2 tbsp toffee sauce and 4 tbsp milk to add moisture.
2. Spread the whipped cream frosting over the top, creating a shallow well in the center.
3. Fill the well with toffee sauce (thin with cream if necessary). Arrange caramelized banana slices on top and serve with extra sauce.

Notes

The cake stores in an airtight container in the refrigerator for up to 3 days. If you prefer not to make toffee, premade dulce de leche, caramel, or butterscotch are excellent substitutes.